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Histological Evaluation of Peri-Implant Soft Tissues in Immediately Loaded Implants Featuring Different Implant-Abutment Connections: A Preliminary Study

January 2012
European Journal of Inflammation 10(1):91-98

DOI:10.1177/1721727X1201000110

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CC BY-NC

Authors:

Maxelin Guerra

National University of Saint Anthony the Abbot in Cuzco

Iole Vozza

Sapienza University of Rome

Alessandro Quaranta

The University of Sydney

The aim of the present study is to evaluate the pen-implant soft tissues and the amount of inflammatory cells around two different implant-abutment connections (self-locking conical connection with platform switching and screwed connection with standard abutment and internal anti-rotational system). Histological analysis was made of 14 implants, 7 with self-locking Morse tapered connection (experimental group A) and 7 with screw-retained anti-rotational connection (control group B). Sixty days after non-functional immediate loading, pen-implant tissue biopsies were performed. In the samples taken from the experimental group the pen-implant connective tissue consisted of a greater density of collagen and fibroblasts compared to the connective tissue of the control group. The experimental group specimens showed less inflammatory infiltrate close to the self-locking tapered connection compared to the tissues around the screw-retained connection. The SEM observations showed less microgap in the self-locking conical connection than in the screw connections with standard abutment and internal anti-rotational system. The presence of connective tissue with few inflammatory cells and the absence of inflammatory infiltrate, in self-locking conical connection implants is due to the minimal size of the implant-abutment microgap that does not allow the passage of fluids and bacteria from the oral cavity to the implant thus preventing tissue inflammation.

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Histological Evaluation of Peri-Implant Soft Tissues in Immediately Loaded Implants Featuring Different Implant-Abutment Connections: A Preliminary Study

Abstract

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